[asterisk-users] Setup Own IP PBX Server

[Chandran Manikandan]

Hi All,
I would like to Setup own IP PBX Server for our office.
I need to connect our all branch office with head quarter through local
extensions.
I need to receive and make call from our branch office and head quarter
using own DID numbers.
Our branch offices located in India,Indonesia, Philippine,us,Australia and
head quarter  is located in Singapore.

I need individual Singapore DID number.

I have installed Freepbx server and tried to configure sip extension. It's
working fine.
Apart from this kindly advise step by step for setup own ip pbx server.

I have centos linux knowledge as well.

Please assist any one.

-- 
*Thanks,*
*Manikandan.C*
*System Administrator*
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